[.041 Safety Wire]

Yes Its pretty ingenius how the prop and prop govenor work together to maintain a constant engine speed, most of my experience is with Hamilton Standard Propellers. some counterweighted and some full hydromatics. Minimum Aeroprop and Dowty Rotol . The really crazy props are the ones that change their pitch mechanically rather than using engine oil hydraulically. This was common in German WWII props and some of the Dowty Rotols. Then of course you have the Curtiss Electrics that have an electric motor mounted in the dome and a brush block to feed it. The motor controls blade angle through a planetary gear train.